This Power Lock 30 feet tape measure has all the features you need for precise measurements every time. With its Tru-Zero end hook, you can draw circles and arcs and framing a wall is made easy with 16 inch and 19.2 inch stud center markings.7 feet blade standoutExclusive blade controlChrome high-impact ABS case is job site toughSecure blade lock won't creep during measurements16 in. and 19.2 in. stud center markings simplify framing jobsCorrosion-resistant Tru-Zero end hook for accurate measurements